package com.itheima.controller;

import com.itheima.pojo.Result;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.Md5Util;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("/user")
@Validated
public class UserController {

	@Autowired
	private UserService userService;

	//注册用户
	@PostMapping("/register")
	public Result register(@Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password) {
		//查询用户
		User u = userService.findByUserName(username);
		if (u == null) {
			//没有占用
			//注册
			userService.register(username, password);
			return Result.success();
		} else {
			//占用
			return Result.error("用户名已被占用");
		}
	}

	//登录校验
	@PostMapping("/login")
	public Result<String> login(@Pattern(regexp = "^\\S{2,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){
		//根据用户名查询用户
		User loginUser = userService.findByUserName(username);
		//判断用户是否存在
		if (loginUser==null){
			return Result.error("用户名错误");
		}

		//判断密码是否正确  loginUser对象中的password是密文
		if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
			//登录成功
			Map<String,Object> claims = new HashMap<>();
			claims.put("id",loginUser.getId());
			claims.put("username",loginUser.getUsername());
			String token  = JwtUtil.genToken(claims);
			return Result.success(token);
		}
		return Result.error("密码错误");
	}

	//查询用户信息
	@GetMapping("/userInfo")
	public Result<User> userInfo(@RequestHeader(name="Authorization") String token){
		//根据用户名查询用户
		/*Map<String,Object> map = JwtUtil.parseToken(token);
		String username = (String) map.get("username");*/

		Map<String,Object> map = ThreadLocalUtil.get();
		String username = (String) map.get("username");

		User user = userService.findByUserName(username);
		return Result.success(user);
	}

	//更新用户信息
	@PutMapping("/update")
	public Result update(@RequestBody @Validated User user){
		userService.update(user);
		return Result.success();
	}

	//更新用户头像
	@PatchMapping("updateAvatar")
	public Result updateAvatar(@RequestParam @URL String avatarUrl){
		userService.updateAvatar(avatarUrl);
		return Result.success();
	}

	//更新用户密码
	@PatchMapping("/updatePwd")
	public Result updatePwd(@RequestBody Map<String,String> params){
		//1.校验参数
		String oldPwd = params.get("old_pwd");
		String newPwd = params.get("new_pwd");
		String rePwd = params.get("re_pwd");

		if (!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)) {
			return Result.error("缺少必要的参数");
		}

		//原密码是否正确
		//调用userService根据用户名拿到原密码,再和old_pwd对比
		Map<String,Object> map = ThreadLocalUtil.get();
		String username = (String) map.get("username");
		User loginUser = userService.findByUserName(username);
		if(!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
			return Result.error("原密码填写不正确");
		}

		//newPwd和rePwd是否一样
		if(!rePwd.equals(newPwd)){
			return Result.error("两次填写的密码不一样");
		}

		//2.调用service完成密码更新
		userService.updatePwd(newPwd);
		return  Result.success();
	}

}
